入 - enter, insert

hospitalization; hospitalisation

intervention

insertion; incorporation; infixing

sunset

inflow; influx

admission fee (for a museum, etc.)

high income

entry; approach; penetration

becoming a pupil (of); becoming an apprentice

introduction; bringing in; installation; setting up; importation

to purchase; to buy in

entry (in a form, register, diary, etc.); filling in; filling out